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Introducing the MQ-3 Alcohol Gas Sensor Module

Are you in need of a reliable and accurate solution for detecting alcohol gas? Look no further than the MQ-3 Alcohol Gas Sensor Module. This compact and versatile sensor is designed to detect and measure alcohol gas, making it perfect for applications such as alcohol checking and breathalyzers. With its advanced features and easy integration, this sensor is a must-have for anyone working in the field of gas detection.


  • Built-in Power Indicator LED and Low TTL Indicator LED: The MQ-3 Alcohol Gas Sensor Module features convenient indicator LEDs that provide visual feedback on the power status and TTL logic output, ensuring easy monitoring and troubleshooting.
  • Operating Voltage of +5V: With an operating voltage of +5V, this sensor is compatible with a wide range of power sources, making it suitable for integration with most common microcontrollers and electronic systems.
  • High Sensitivity to Alcohol: The MQ-3 sensor is highly sensitive to alcohol, allowing it to accurately detect even trace amounts of alcohol gas in the surrounding environment. This makes it an ideal choice for applications that require precise alcohol detection.
  • Slight Sensitivity to Benzine: In addition to alcohol, the MQ-3 sensor also exhibits slight sensitivity to benzine. This feature enables the detection and measurement of benzine gas, further enhancing the versatility of the sensor.
  • Analog and Digital Output: The sensor offers both analog and digital output options for measuring the concentration of alcohol gas. The analog pin provides a voltage output ranging from 0V to 5V, allowing for precise measurements. The digital pin operates on TTL logic and provides a binary output of either 0V or 5V, which simplifies integration and operation.
  • Preheat Duration of 20 Seconds: The MQ-3 sensor requires a preheat duration of 20 seconds to stabilize and ensure accurate readings. This short preheat time allows for quick deployment and reliable operation.
  • Digital or Analog Sensor Operation: The MQ-3 Alcohol Gas Sensor Module can be used as either a digital or analog sensor, depending on your specific requirements. This flexibility makes it adaptable to a variety of applications and system designs.
  • Adjustable Sensitivity: The sensitivity of the digital pin can be easily adjusted using the built-in potentiometer. This feature allows for fine-tuning the sensor’s response to achieve optimal performance in different environments and gas concentration levels.
  • Compact Design: With dimensions of 32mm (L) x 22mm (W) x 18mm (H) and a lightweight of only 10g, the MQ-3 Alcohol Gas Sensor Module offers a compact and space-efficient solution for gas detection applications. Its small form factor enables seamless integration into your existing projects or systems.

Package Contents:

1 x MQ-3 Alcohol Sensor Module

With the MQ-3 Alcohol Gas Sensor Module, you can ensure accurate and reliable detection of alcohol gas, making it an indispensable tool for alcohol checking and breathalyzer applications. Don’t compromise on quality or performance—choose the MQ-3 Alcohol Gas Sensor Module today and experience precise gas detection like never before!

Weight 0.1 kg
Dimensions 3.2 × 2.2 × 1.8 cm


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